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闸阀是最常用的截断阀之一，主要用来接通或截断管路中的介质，不适用于调节介质流量。闸阀适用的压力、温度及口径范围很大，尤其适用于中、大口径的管道。
闸阀的主要优点：
（1）流体阻力小。闸阀闸体内部介质通道是直通的，介质流经闸阀时不改变其流动方向，因而流动阻力较小。
（2）启闭较省力。启闭时闸板运动方向与介质流动方向相垂直。与截止阀相比，闸阀的启闭较为省力。
（3）介质流动方向一般不受限制。介质可从闸阀两侧任意方向流过，均能达到接通或截断的目的。便于安装，适用于介质的流动方向可能改变的管路中。
主要零件材料及性能规范
|
主要零部件 |
阀体
阀盖 |
碳钢 |
铬镍钛不锈钢 |
铬镍钼钛不锈钢 |
超低碳不锈钢 |
铬钼合金钢 |
低温碳钢 |
|
闸板
阀座 |
碳钢堆焊硬质合金或不锈钢 |
铬镍钛不锈钢
堆焊硬质合金 |
铬镍钼钛不锈钢
堆焊硬质合金 |
超低碳不锈钢 |
铬钼合金钢
堆焊硬质合金 |
不锈钢堆焊硬质合金 |
|
阀杆 |
铬不锈钢 |
铬镍钛不锈钢 |
铬镍钼钛不锈钢 |
超低碳不锈钢 |
铬钼合金钢 |
不锈钢 |
|
填料 |
石墨石棉盘根 |
浸聚四氟乙烯石棉盘根 |
柔性石墨石棉盘根 |
浸聚四氟乙烯石棉盘根 |
|
垫片 |
石棉垫片 |
不锈钢带四氟乙烯缠绕垫片 |
柔性石墨+不锈钢 |
聚四氟乙烯 |
|
阀杆螺母 |
高镍球铁/ZguAL10Fe3 |
|
主要参数 |
适用介质 |
水、蒸汽、油品 |
硝酸类 |
醋酸类 |
尿素、甲铵液等 |
水、蒸汽、石油及石油产品 |
氨气、液氨 |
|
适用温度℃ |
≤425 |
≤200 |
≤200 |
≤200 |
≤550 |
-45～150 |
|
型号 |
公称
通径
NPS(in) |
压力级
Class |
主要结构尺寸(mm) |
阀体
材料 |
性能规范 |
|
Do |
D |
L |
H |
适用温度
(℃) |
适用
介质 |
|
SFZ-61C150C |
2" |
150 |
200 |
|
216 |
400 |
WCB |
≤425 |
蒸汽、油品、水等 |
|
|
3" |
" |
250 |
|
283 |
509 |
" |
" |
" |
|
|
4" |
" |
300 |
|
305 |
585 |
" |
" |
" |
|
|
6" |
" |
350 |
|
403 |
795 |
" |
" |
" |
|
|
8" |
" |
350 |
|
419 |
1015 |
" |
" |
" |
|
|
10" |
" |
400 |
|
457 |
1230 |
" |
" |
" |
|
|
12" |
" |
450 |
|
502 |
1465 |
" |
" |
" |
|
|
14" |
" |
500 |
|
572 |
1755 |
" |
" |
" |
|
|
16" |
" |
500 |
|
610 |
2030 |
" |
" |
" |
|
|
18" |
" |
600 |
|
660 |
2210 |
" |
" |
" |
|
|
20" |
" |
750 |
|
711 |
2510 |
" |
" |
" |
|
|
24" |
" |
750 |
|
813 |
2880 |
" |
" |
" |
|
|
30" |
" |
915 |
|
915 |
3200 |
" |
" |
" |
|
|
36" |
" |
915 |
|
1016 |
3734 |
" |
" |
" |
|
SFZ-61C300C |
2" |
300 |
200 |
|
216 |
470 |
WCB |
≤425 |
蒸汽、油品、水等 |
|
|
3" |
" |
250 |
|
283 |
533 |
" |
" |
" |
|
|
4" |
" |
300 |
|
305 |
610 |
" |
" |
" |
|
|
6" |
" |
350 |
|
403 |
845 |
" |
" |
" |
|
|
8" |
" |
400 |
|
419 |
1050 |
" |
" |
" |
|
|
10" |
" |
450 |
|
457 |
1295 |
" |
" |
" |
|
|
12" |
" |
500 |
|
502 |
1600 |
" |
" |
" |
|
|
14" |
" |
500 |
|
762 |
1830 |
" |
" |
" |
|
|
16" |
" |
600 |
|
838 |
2035 |
" |
" |
" |
|
|
18" |
" |
600 |
|
914 |
2195 |
" |
" |
" |
|
|
20" |
" |
750 |
|
991 |
2470 |
" |
" |
" |
|
|
24" |
" |
960 |
|
1143 |
2900 |
" |
" |
" |
|
SFZ-61C600C |
2" |
600 |
200 |
|
292 |
495 |
WCB |
≤425 |
蒸汽、油品、水等 |
|
|
3" |
" |
300 |
|
356 |
615 |
" |
" |
" |
|
|
4" |
" |
350 |
|
432 |
735 |
" |
" |
" |
|
|
6" |
" |
450 |
|
559 |
1005 |
" |
" |
" |
|
|
8" |
" |
500 |
|
660 |
1245 |
" |
" |
" |
|
|
10" |
" |
600 |
|
787 |
1480 |
" |
" |
" |
|
|
12" |
" |
750 |
|
838 |
1730 |
" |
" |
" |
|
|
14" |
" |
850 |
|
889 |
1915 |
" |
" |
" |
|
|
16" |
" |
850 |
|
991 |
2050 |
" |
" |
" |
|
|
18" |
" |
960 |
|
1092 |
2260 |
" |
" |
" |
|
|
20" |
" |
960 |
|
1094 |
2260 |
" |
" |
" |
|
|
24" |
" |
1100 |
|
1397 |
2900 |
" |
" |
" |
注：焊接坡口尺寸按相关标准或按用户要求执行。 | 